I noticed that snapped weapons are handled differently than bag drops, since they are added to your inventory. It's a flaw in the chariot system;
If you've been charioting for a difficult combination of damage type/element/race bonus, and decide you'll settle for best 2 out of 3 from a previous snap, it does not suffice to simply go to the completed snap in that occasion: Your last snap combo will still be in inventory, instead of the one that occurred at that timeline. You MUST redo the snapping action to change the weapon into the type desired.
A recent board post: www.gamefaqs.com/boards/999440-tactics-ogre-let-us-cling-together/64945482
made mention of utilizing the Firecrest when snapping a cursed weapon with a unit. At first I assumed this was nonsense, but it was in fact confirmed as 'old knowledge'. Old knowledge noticeably lacking from the Cursed Weapon Info, unfortunately. So this message should remedy it, although such important info should really be on the first page.
When the Crest of Fire is used, its -10 RT has as a result that the snapped weapon is 5RT faster! Not only that, but the Firecrest is in fact returned to inventory after snapping, as are all equipped items. Snapping a unit with any gear other than the Firecrest and cursed weapon is probably a bad idea, because it will be slowed down.
I also suggested that having Boon of Swiftness pre-cast before the unit's turn begins, might further reduce the RT of the cursed weapon. I haven't been able to test this myself yet, so I hope somebody can update the info about this.
A cursed weapon will snap as a roughly 40RT weapon to attack with (give or take 5 points depending on which class was used), that has 0 weight. If the Firecrest was used, that average drops to 35RT per strike.
If Boon of Swiftness also works, it might further reduce the RT by 25%. So I'm curious to find out if this works too. If so, cursed weapons might be snappable for an average of 27RT, which would be faster than most of the strong endgame weapons!
"My country is the world, and my religion is to do good." - Thomas Paine